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Interface and Hardware Component Configuration Guide for Cisco 8000 Series Routers, IOS XR Release 25.1.x, 25.2.x, 25.3.x, 25.4.x

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Updated:: December 17, 2025

Chapter: New and Changed Feature Information

New and Changed Feature Information
Interface and Hardware Component Features Added or Modified in IOS XR Release 25.x.x

New and Changed Feature Information

This table summarizes the new and changed feature information for the Interfaces Configuration Guide for Cisco 8000 Series Routers for Cisco 8000 Series Routers, and tells you where they are documented.

Interface and Hardware Component Features Added or Modified in IOS XR Release 25.x.x

This table summarizes the new and changed feature information for the Interfaces Configuration Guide for Cisco 8000 Series Routers for Cisco 8000 Series Routers, and tells you where they are documented.

Table 1. New and Changed Features
Feature	Description	Introduced in Release	Where Documented
Single UDP port for IPv4 and IPv6 packets	This feature was introduced.	Release 25.4.1	Generic UDP encapsulation
GUEv1 static tunnel configuration over IPv4 networks	This feature was introduced.	Release 25.4.1	GUEv1 static tunnel configuration over IPv4 networks
Increased IP-in-IP tunnel scale for gRIBI-based nexthops	This feature was introduced.	Release 25.4.1	Configure IP-in-IP tunnels
Enhanced hashing functions using extended entropy profiles	This feature was introduced.	Release 25.4.1	Hashing functions for load balancing
Configure 2x400G and 8x100G breakout modes	This feature was modified.	Release 25.3.1	Configure 2x400G and 8x100G breakout modes
Y.1731 support on CFM	This feature was modified.	Release 25.3.1	Ethernet CFM
Continuity Check (IEEE 802.1ag and ITU-T Y.1731)	This feature was modified.	Release 25.3.1	Continuity Check (IEEE 802.1ag and ITU-T Y.1731)
Loopback (IEEE 802.1ag and ITU-T Y.1731)	This feature was modified.	Release 25.3.1	Loopback (IEEE 802.1ag and ITU-T Y.1731)
Linktrace (IEEE 802.1ag and ITU-T Y.1731)	This feature was modified.	Release 25.3.1	Linktrace (IEEE 802.1ag and ITU-T Y.1731)
Configure 2x200G DACs with 2x200 Breakout	This feature was introduced.	Release 25.2.1	Configure 2x200G DACs with 2x200 Breakout
Factory reset of routers to remove SSD data	This feature was modified.	Release 25.1.1	Factory reset of routers to remove SSD data
Secure erase of router SSD data	This feature was introduced.	Release 25.1.1	Secure erase of router SSD data
Minimum-delay bin	This feature was introduced.	Release 25.1.1	Minimum delay bin
Copy TTL value to IP headers	This feature was introduced.	Release 25.1.1	Time-to-Live Uniform Mode
Integrated Routing and Bridging (IRB)	This feature was introduced.	Release 25.1.1	Configure Integrated Routing and Bridging

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